Device for drawing off a near-wall boundary air layer

摘要

For drawing off a near-wall boundary air layer (3) of a flow, and that of a moving and in parallel with the flow wall delimiting the flow is supplied by a around a roller (1) and is guided, endless belt (2) is formed, a suction device is used which, in the deflection region of the roller (1) is arranged. The suction device consists of a with a suction channel (10) provided with a suction box (5) and from a suction panel (6). The suction panel (6) is provided with perpendicular to the direction of the flow directed passage openings (13) and provided in the plane of the moving wall. The suction panel (6) is laterally with the suction box (5), and bridges the space between the roller (1) and the front side (8) of the suction box (5). The front edge (14) of the suction panel (6) is rounded.